diff options
| author | Kees Cook <[email protected]> | 2023-10-03 16:17:41 -0700 |
|---|---|---|
| committer | David S. Miller <[email protected]> | 2023-10-06 11:36:25 +0100 |
| commit | b3783e5efde4201b2cc7a2fee41791b413137f4c (patch) | |
| tree | a361d16c40085689d867f4329669748e93bd7253 | |
| parent | 71ce60d375f5be15ef6db19aa63ebd2d72f1457c (diff) | |
net/packet: Annotate struct packet_fanout with __counted_by
Prepare for the coming implementation by GCC and Clang of the __counted_by
attribute. Flexible array members annotated with __counted_by can have
their accesses bounds-checked at run-time via CONFIG_UBSAN_BOUNDS (for
array indexing) and CONFIG_FORTIFY_SOURCE (for strcpy/memcpy-family
functions).
As found with Coccinelle[1], add __counted_by for struct packet_fanout.
Cc: "David S. Miller" <[email protected]>
Cc: Eric Dumazet <[email protected]>
Cc: Jakub Kicinski <[email protected]>
Cc: Paolo Abeni <[email protected]>
Cc: Willem de Bruijn <[email protected]>
Cc: Anqi Shen <[email protected]>
Cc: [email protected]
Link: https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci [1]
Signed-off-by: Kees Cook <[email protected]>
Reviewed-by: Gustavo A. R. Silva <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
| -rw-r--r-- | net/packet/internal.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/net/packet/internal.h b/net/packet/internal.h index 63f4865202c1..d29c94c45159 100644 --- a/net/packet/internal.h +++ b/net/packet/internal.h @@ -94,7 +94,7 @@ struct packet_fanout { spinlock_t lock; refcount_t sk_ref; struct packet_type prot_hook ____cacheline_aligned_in_smp; - struct sock __rcu *arr[]; + struct sock __rcu *arr[] __counted_by(max_num_members); }; struct packet_rollover { |